This document discusses testing strategies for microservices. It recommends writing tests at different levels of granularity, from unit tests up to system integration tests. This forms a "test pyramid" structure where there are many low-level unit tests and fewer high-level integration tests. Microservices should be tested both individually through component integration tests and together through system integration tests. Writing tests provides confidence that code works as intended and makes maintenance and development easier.

1. Prepared by Name Surname, Position www.intellias.com
Testing Microservices
Prepared by Max Danylenko, Senior Java
Developer
www.intellias.com

2. Why do we write tests?
Give us confidence that the code does what it
should.
Make maintenance easier, something that is commonly overlooked when
writing tests.
Provide feedback that is fast, accurate, reliable and
predictable.

3. Traditional test strategy
Cohn's test
pyramid
Write tests with different
granularity
The more high-level you get
the fewer tests you should
have

4. Testing Pyramids & Ice-Cream Cones (anti-pattern)

5. Forgotten layer of the test automation pyramid
Forgotten layer

6. Microservice Architecture
Client Requests Client Requests Client Requests
User Interface Layer
Service
Component
Component
Service
Component
Component
Service
Component
Component

7. Common core concepts of Microservice Architecture
• Easier
deployment
through an
effective and
streamlined
delivery pipeline.
• Scalability.
• High degree of
application and
component
decoupling.
01
• Single-purpose
function.
• An independent
portion of a large
business
application.
• Tech component.
02
• Components within
the architecture are
fully decoupled from
one other
• Accessed through
some sort of remote
access protocol
(e.g., JMS, AMQP,
REST, SOAP, RMI,
etc.)
03
A service
component
Separately
deployed
units
A distributeda
rchitecture

8. Microservices test strategy
System integration tests
Component integration tests

9. Greeting microservice

10. Unit tests

11. Integration Tests

12. Thanks for your attention
Майкл Уэлан

13. Resources
1. The Practical Test Pyramid
2. Testing Pyramids & Ice-Cream Cones
3. The forgotten layer
4. Testing of Microservices
5. Software Architecture Patterns by Mark Richards
6. Testing Microservices by Ham Vocke
7. Working Effectively with Unit Tests by Jay Fields
8. Source code on github